Drilling and reaming tool for deburring

Abstract

The utility model relates to the technical field of cutting tools, and discloses a deburring drilling and reaming tool which comprises a tool handle part, a second drilling and reaming part is arranged at the front end of the tool handle part, a first spiral groove is formed in the front section of the second drilling and reaming part, the tool handle part is connected with the second drilling and reaming part through a transition part, and the transition part is in a circular truncated cone shape. The front section of the outer wall of the second drilling and reaming part is provided with a drilling and reaming blade part, a drilling and reaming blade of the drilling and reaming blade part is arranged to be in a three-blade spiral shape, the part, away from the cutter handle part, of the second drilling and reaming part is provided with a first drilling and reaming part, the first drilling and reaming part is arranged to be in a step shape, and the diameter of the section of the front end of the first drilling and reaming part is smaller than that of the section of the drilling and reaming blade part. According to the utility model, through the arrangement of the first drilling and reaming part, burrs at a hole outlet part can be controlled, the operation of removing the burrs again after a workpiece is cut is not needed, the workpiece processing efficiency is improved, and the hole quality is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of cutting tools, in particular to a drilling and reaming tool for deburring. Background Art

[0002] Cutting tools, also known as cutting tools, are tools used for cutting in mechanical manufacturing. While the vast majority of cutting tools are machine-made, some are also hand-made. Since cutting tools used in mechanical manufacturing are essentially all used to cut metal, the term "cutting tool" is generally understood to refer to metal cutting tools. Drills and reamers are precision cutting tools, essential tools in precision machining. They are primarily used for enlarging, finishing, or trimming holes. Compared to traditional drills, drills and reamers offer higher tool design and machining precision, effectively improving hole geometry and surface quality.

[0003] However, when the existing drill reamer is used for machining and cutting, burrs are easily generated at the hole exit of the workpiece. After the cutting is completed, the workpiece needs to be deburred, which is a complicated operation and inefficient. Utility Model Content

[0004] In order to make up for the above shortcomings, the utility model provides a drill-reamer tool for deburring, which aims to improve the problem that burrs are easily generated at the hole exit of the workpiece during cutting by the existing drill-reamer.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a drill and reamer tool for deburring, comprising a shank portion, a second drill and reamer portion is provided at the front end of the shank portion, a drill and reamer blade portion is provided at the front section of the outer wall of the second drill and reamer portion, a first drill and reamer portion is provided at the portion of the second drill and reamer portion away from the shank portion, the first drill and reamer portion is arranged in a step shape, and the cross-sectional diameter of the front end of the first drill and reamer portion is smaller than the cross-sectional diameter of the drill and reamer blade portion.

[0006] Preferably, the shank portion and the second drilling and reaming portion are connected via a transition portion, and the transition portion is truncated cone-shaped.

[0007] Preferably, a first spiral groove is provided at the front section of the second drilling and reaming portion, a chip removal groove is provided at the rear section of the second drilling and reaming portion, and the second drilling and reaming portion is communicated with the chip removal groove.

[0008] Preferably, the first drilling and reaming portion is provided with a second spiral groove, and the second spiral groove is communicated with the first spiral groove.

[0009] Preferably, the surface of the drill reamer blade is coated with a hard coating.

[0010] Preferably, the drill blade of the drill blade portion is configured to be a three-blade spiral.

[0011] Preferably, the front end diameter of the first drilling and reaming portion differs from the cross-sectional diameter of the drilling and reaming blade by 0.1 to 0.2 mm, and the length of the first drilling and reaming portion is set to 2 to 3 mm.

[0012] Preferably, the step angle of the first drilling and reaming portion is 45° to 70°.

[0013] The utility model has the following beneficial effects:

[0014] 1. In the present invention, the workpiece can be rough-machined first by the first drilling and reaming part, thereby removing most of the burrs and creating a stable and uniform surface foundation for the second drilling and reaming part, so that the second drilling and reaming part can improve the surface quality and dimensional accuracy of the hole-exiting part. This arrangement is conducive to the drill reamer being able to control the burrs at the hole-exiting part when processing the workpiece, so that the forming quality of the hole can be improved during the processing of the workpiece, and there is no need to remove the burrs of the workpiece again after cutting, thereby improving the processing efficiency of the workpiece and being beneficial to the quality of the hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural diagram of a deburring drill and reamer tool proposed in the utility model;

[0016] Figure 2 This is a side view schematic diagram of a deburring drill and reamer tool proposed in the utility model;

[0017] Figure 3 for Figure 1 A in the enlarged view.

[0018] Legend:

[0019] 1. Shank; 2. Transition part; 3. Chip removal groove; 4. First spiral groove; 5. First drilling and reaming part; 6. Drilling and reaming blade; 7. Second drilling and reaming part; 8. Second spiral groove. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the specification of the embodiment of the present invention to clearly and completely describe the technical solutions in the embodiment of the present invention. Obviously, the embodiment described is only a part of the embodiment of the present invention, not all the embodiments. Based on the embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0021] Reference Figure 1-Figure 3The present invention provides an embodiment of a drill reamer tool for deburring, comprising a shank portion 1, a second drill reamer portion 7 is provided at the front end of the shank portion 1, the shank portion 1 and the second drill reamer portion 7 are connected by a transition portion 2, the transition portion 2 is a truncated cone, and the transition portion 2 is designed to be a tapered truncated cone. The purpose is to reduce shear force, facilitate the entry of cutting materials, and have an important influence on vibration suppression and cutting stability; the front section of the second drill reamer portion 7 is provided with a first spiral groove 4, and the rear section of the second drill reamer portion 7 is provided with a chip groove 3, the first spiral groove 4 is connected to the chip groove 3, and when the drill reamer cuts the workpiece, the first spiral groove 4 and the chip groove 3 can provide a discharge channel for chips generated during the cutting process, keep the cutting area clean, and reduce friction during the cutting process; the front section of the outer wall of the second drill reamer portion 7 is provided with a drill reamer blade portion 6, and the drill reamer blade portion 6 is set to a three-edge spiral shape. The three-edge spiral drill reamer can balance the cutting force during the cutting process, reduce vibration, and is conducive to improving The tool is stable and suitable for a variety of materials, including metals, plastics and composite materials, so that it performs well in applications in multiple industries. The surface of the drill blade 6 is coated with a hard coating, and the hard coating can be made of titanium nitride (TiN). The hard coating can maintain the tool performance under high temperature and high-speed cutting conditions, improve the wear resistance of the tool, reduce friction during cutting, and thus improve the tool life; the second drill portion 7 is away from the shank portion 1. The first drill portion 5 is provided with a second spiral groove 8, and the second spiral groove 8 is connected to the first spiral groove 4. The first drill portion 5 is set to a step shape, and the step angle of the first drill portion 5 is 45°~70°. The step angle can be adjusted according to actual production. The front end cross-sectional diameter of the first drill portion 5 is smaller than the cross-sectional diameter of the drill blade 6. The front end diameter of the first drill portion 5 differs from the cross-sectional diameter of the drill blade 6 by 0.1~0.2MM, and the length of the first drill portion 5 is set to 2~3MM.

[0022] Specifically, the base material of each part can be made of cemented carbide, and the working part of each cutting edge can be made of PCD, which ensures the rigidity and strength of the tool base while making the cutting edge have high hardness and wear resistance, thereby improving the service life of the tool; the front end cross-sectional diameter of the first drilling and reaming part 5 is in the attached Figure 1 and Figure 3 In the figure, φA is used to represent the cross-sectional diameter of the drilling and reaming portion 6, φB is used to represent the step angle, and L is used to represent the length of the first drilling and reaming portion 5. By setting a stepped first drilling and reaming portion 5, the allowance can be distributed through the step, so that the first drilling and reaming portion 5 can first perform rough processing on the workpiece to remove most of the burrs, thereby creating a relatively stable and uniform surface foundation for the second drilling and reaming portion 7 to perform fine processing on the workpiece, so that the main task of fine processing is to improve the surface quality and dimensional accuracy, so as to achieve the effect of accurately controlling the burrs at the hole exit position, thereby being beneficial to the forming quality of the workpiece hole.

[0023] Working principle: When cutting a workpiece, the first drilling and reaming part 5 can perform rough processing on the workpiece first to remove most of the burrs, while the second drilling and reaming part 7 provides fine processing for the workpiece, thereby controlling the burrs at the hole exit.

[0024] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A deburring drilling and reaming tool, comprising a shank portion (1), characterized in that: A second drill reaming portion (7) is provided at the front end of the shank portion (1), a drill reaming blade portion (6) is provided at the front section of the outer wall of the second drill reaming portion (7), a first drill reaming portion (5) is provided at a portion of the second drill reaming portion (7) away from the shank portion (1), the first drill reaming portion (5) is arranged in a step shape, and the cross-sectional diameter of the front end of the first drill reaming portion (5) is smaller than the cross-sectional diameter of the drill reaming blade portion (6).

2. The deburring drill reamer according to claim 1, characterized in that: The shank portion (1) and the second drilling and reaming portion (7) are connected via a transition portion (2), and the transition portion (2) is in a truncated cone shape.

3. The deburring drill reamer according to claim 1, characterized in that: The front section of the second drilling and reaming part (7) is provided with a first spiral groove (4), the rear section of the second drilling and reaming part (7) is provided with a chip removal groove (3), and the first spiral groove (4) is communicated with the chip removal groove (3).

4. The deburring drill reamer according to claim 3, characterized in that: The first drilling and reaming portion (5) is provided with a second spiral groove (8), and the second spiral groove (8) is communicated with the first spiral groove (4).

5. The deburring drill reamer according to claim 1, characterized in that: The surface of the drill reamer blade (6) is coated with a hard coating.

6. The deburring drill reamer according to claim 1, characterized in that: The drilling and reaming blade of the drilling and reaming blade portion (6) is arranged in a three-edged spiral shape.

7. The deburring drill reamer according to claim 1, characterized in that: The front end diameter of the first drilling and reaming part (5) differs from the cross-sectional diameter of the drilling and reaming blade part (6) by 0.1 to 0.2 mm, and the length of the first drilling and reaming part (5) is set to 2 to 3 mm.

8. The deburring drill reamer according to claim 1, characterized in that: The step angle of the first drilling and reaming portion (5) is 45° to 70°.

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